Statements of Changes in Net Assets - USD ($)	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Statement of Stockholders' Equity [Abstract]
Net Assets—beginning of year	$ 656,592,798	$ 586,245,772	$ 442,483,105
Creations	114,227,672	137,482,147	179,243,246
Redemptions	(28,535,208)	(98,749,384)	(17,297,147)
Net investment loss	(1,798,880)	(1,557,794)	(1,271,275)
Net realized gain from gold bullion distributed for redemptions	3,399,475	1,178,406	1,756,856
Net change in unrealized appreciation (depreciation) on investment in gold bullion	36,298,490	31,993,651	(18,669,013)
Net Assets—end of year	$ 780,184,347	$ 656,592,798	$ 586,245,772